Traversal system works wrong on irregular Obstacle.

[franktmy]

Traversal system not work on these two shaps(Traversal trace channel is set to block globally in project settings),one is I made with brush tool,another is Blockout_Skewbox actor from blockout tools plugins,It's this project only works well on Box?

[franktmy]

this is property I set on Blockout_Skewbox,When Skewbox Lenght.Z set in a small value Traversal system works,when it become larger not works.I try to debug it,And find setting Capsule half height offset form 2 to 5,solve the problem,but the one I made with brush tools whitch has irregular top surface can not work.